/*
 * The contents of this web application are subject to the Mozilla Public License Version 
 * 1.1 (the "License"); you may not use this web application except in compliance with 
 * the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/.
 * 
 * Software distributed under the License is distributed on an "AS IS" basis, 
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
 * for the specific language governing rights and limitations under the License.
 * 
 * The Original Code is owned by and the Initial Developer of the Original Code is 
 * Composite A/S (Danish business reg.no. 21744409). All Rights Reserved
 * 
 * Section 11 of the License is EXPRESSLY amended to include a provision stating 
 * that any dispute, including but not limited to disputes related to the enforcement 
 * of the License, to which Composite A/S as owner of the Original Code, as Initial 
 * Developer or in any other role, becomes a part to shall be governed by Danish law 
 * and be initiated before the Copenhagen City Court ("K�benhavns Byret")            
 */

using System;
using System.Collections.Concurrent;
using System.Linq;
using Composite.C1Console.Security;
using Composite.Core;

namespace Composite.C1Console.Elements
{
    /// <summary>
    /// Associates C1 console tree elements with a url-s to be showing in the C1 console browser.
    /// </summary>
    public static class UrlToEntityTokenFacade
    {
        private static readonly ConcurrentBag<IUrlToEntityTokenMapper> _mappers = new ConcurrentBag<IUrlToEntityTokenMapper>();

        /// <summary>
        /// Returns a url associated with an entity token, or null if current entity token does not support this kind of entity token.
        /// </summary>
        /// <param name="entityToken">The entity token.</param>
        /// <returns></returns>
        public static string TryGetUrl(EntityToken entityToken)
        {
            return _mappers.Select(mapper => mapper.TryGetUrl(entityToken)).FirstOrDefault(url => url != null);
        }

        /// <summary>
        /// Returns an entity token associated with a url, or null if current <see cref="IUrlToEntityTokenMapper"/> does not support this kind of entity token.
        /// </summary>
        /// <param name="url">The url.</param>
        /// <returns></returns>
        public static EntityToken TryGetEntityToken(string url)
        {
            return _mappers.Select(mapper => mapper.TryGetEntityToken(url)).FirstOrDefault(entityToken => entityToken != null);
        }

        /// <summary>
        /// Register an implementation of <see cref="IUrlToEntityTokenMapper" />
        /// </summary>
        /// <param name="mapper"></param>
        public static void Register(IUrlToEntityTokenMapper mapper)
        {
            Verify.ArgumentNotNull(mapper, "mapper");

            if (_mappers.Count > 100)
            {
                Log.LogWarning("UrlToEntityTokenFacade", "More than 100 implementations of {0}-s registered: possible memory leak. Registered type: {1}",
                    typeof(IUrlToEntityTokenMapper).Name, mapper.GetType().FullName);
                return;
            }

            _mappers.Add(mapper);
        }
    }
}
